Method of making fan guards



Jan. 14, 1930. HATCH METHOD OF MAKING FAN GUARDS Filed Sept 15, 1928 I INVENTOR Z/mr/ra Z flafc/r Patented Jan. 14, 1930 UNITED STATES PATENT OFFICE GEARLES T. HATCH, F ALBION, MICHIGAN, ASSIGNOR TO UNION STEEL PRODUCTS COMPANY, OF ALBION, MICHIGAN METHOD OF MAKING FAN GUARDS Applicationv filed September 15, 1928. Serial No. 306,253.-

strong and rigid.

Objects pertaining to details and economies I of my invention will definitely appear from the description to follow.

A fan guard embodying the features of my improvements is clearly illustrated in the accompanying drawing in which:

Fig. 1 is a front view of my improved fan guard.

F Fig. 2 is a detail section on line 2--2 of Fig. 3 is a front View of the center disk as formed prior to assembly with the guard wires.

Fig. 4 is an enlarged detail View on a line corresponding to line 4-4 of Fig. 3 showing the relation of the guard wires to the center disk prior to the electric welding operation.

Fig. 5 is an enlarged detail on line 5-5 of Fig. 2.

As illustrated in the accompanying drawing, my improved fan guard comprises a rim 1, a plurality of radially disposed guard Wires 2 which are bent, largely for the sake of appearance, and the center disk 3 to which the inner ends of the guard wires are secured. This center disk 3 is formed as a sheet metal stamping, a plurality of radial ribs 4 being struck up therefrom providing radial grooves 5 having flat bottoms 6. r

The grooves 6' are of such size that the guard wires 2 may be arranged therein so that they contact only with the bottoms of the grooves, thus providing a line contact for the guard wires and the center disk, insuring a satisfactory weld when the current is applied and uniform welding of all the guard wires.

ing supporting flanges 9 between the guard wires and also giving the appearance of weight or thickness to the center disk.

By this means I am able to produce fan guards very rapidly and economically, and the structures are strong, rigid and attractive 1n appearance.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. The method of manufacturing fan guards consisting of forming a center disk with struck-up radial portions providing radial grooves, said grooves having flat bottoms, the disk being notched at the ends of the grooves and the portions of the edges be tween the notches turned inwardly, disposing guard wires in said grooves so that they contact prior to welding only with the flat bottoms thereof, and uniting by electric welds.

2. The method of manufacturing fan guards consisting of forming a center disk with struck-up radial portions providing radial grooves said grooves having fiat bottoms, disposing guard wires in said grooves so that they contact prior to welding only with the flat bottoms thereof, and uniting by electric welds.

In witness whereof I have hereunto set my hand.

CHARLES T. HATCH.

This arrangement permits/the metal as it 7 fuses to flow out and form a wide bond between the disk and the guard wires as is indicated in Fig. 5. The center disks have notches 7 therein at the outer ends of the grooves, the segmental portions 8 between these notches being turned inwardly provid- 

